''Daphnella rissoides'', common name the Rissoa-like pleurotoma, is a species of

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

, a marine

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family

Raphitomidae Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". '' Malacologia'' 47(1-2). . 3 ...

Description

The length of the shell attains 23 mm. The smooth shell is shining and semitransparent. The first three

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

s are longitudinally plaited, the rest is smooth. The

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

shows a varix nearly opposite the aperture (accidental ?). The columella is spirally twisted. The outer lip is rather thickened and delicately denticulated within. The sinus is small and distinct. The color of the shell is whitish, washed with clouded yellow streaks, the apex pink. G.W. Tryon (1884) Manual of Conchology, structural and systematic, with illustrations of the species, vol. VI; Philadelphia, Academy of Natural Sciences
(described as ''Clathurella rissoides'')

Distribution

This marine species occurs off

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, the Red Sea, the Philippines,

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and Queensland, Australia.

References

* Reeve, L.A. 1843. ''Monograph of the genus Pleurotoma''. pls 1–18 in Reeve, L.A. (ed.). Conchologica Iconica. London : L. Reeve & Co. Vol. 1. * Jousseaume, F., 1896. ''Description d'une coquille nouvelle.'' Le Naturaliste 10(2): 43
L.A. Reeve (1843) - Conchologia iconica, or, Illustrations of the shells of molluscous animals vol. 1
* Souverbie, S.M. 1869. ''Diagnoses de Mollusques inédits provenant de la Nouvelle-Calédonie''. Journal de Conchyliologie 17: 416-421 * Macandrew, R. 1870. ''Report on the testaceous Mollusca obtained during a dredging excursion in the Gulf of Suez in the months of February and March 1869''. Annals and Magazine of Natural History 4 6: 429-450 * Hedley, C. 1922. ''A revision of the Australian Turridae.'' Records of the Australian Museum 13(6): 213–359, pls 42–56 * Dautzenberg, Ph. (1929). ''Mollusques testaces marins de Madagascar''. Faune des Colonies Francaises, Tome III * Powell, A.W.B. 1966. T''he molluscan families Speightiidae and Turridae, an evaluation of the valid taxa, both Recent and fossil, with list of characteristic species.'' Bulletin of the Auckland Institute and Museum. Auckland, New Zealand 5: 1–184, pls 1–23 * Maes, V.O. 1967. ''The littoral marine mollusks of Cocos-Keeling Islands (Indian Ocean).'' Proceedings of the Academy of Natural Sciences, Philadelphia 119: 93–217

External links

Holotype in the MNHN, Paris
*
Gastropods.com: ''Daphnella (Hemidaphne) rissoides''
{{DEFAULTSORT:Daphnella Rissoides rissoides Gastropods described in 1845